Rates and processes of bank erosion, Itaipu Reservoir, Paraguay-Brazil border, South America

DATA DE PUBLICAÇÃO

24/12/2012

RESUMO

Measurement of erosion have been made on nine erosion stations along the south end of Itaipu reservoir, Paraguay-Brazil border, South America, between July 1993 and March 1995. Land-use, shoreline location (embayment or main truck of lake), fetch magnitude and associated wave energy are the critical factors influencing bank erosion. The cycle of erosion of banks at Itaipu reservoir consist of only a few steps: undercutting (wave abrasion), overhang formation, overhang failure and removal of debris from the toe bank. The amount of erosion is highly variable. Mean rates ranging from 0.62 m/yr to 4.80 m/yr and the average rate was 2.19 m/yr. Alternatives approach to mitigate the impact of operating schemes on bank erosion are suggested.

ASSUNTO(S)

bank erosion itaipu reservoir parana river

Documentos Relacionados

• Diet of Iheringichthys labrosus (Pimelodidae, Siluriformes) in the Itaipu Reservoir, Paraná River, Brazil-Paraguay
• The genera Chara and Nitella (Chlorophyta, Characeae) in the subtropical Itaipu Reservoir, Brazil
• Age and growth of Hypophthalmus edentatus (Spix), (Siluriformes, Hypophthalmidae) in the Itaipu Reservoir, Paraná, Brazil
• Reproductive Strategies of Plagioscion squamosissimus Heckel, 1840 (Osteichthyes Sciaenidae) in the Itaipu Reservoir, Brazil
• New records of Cosmarium Corda ex Ralfs (Desmidiaceae, Zygnematophyceae) in a tributary of the Itaipu Reservoir, Paraná, Brazil